js从10种颜色中随机取色实现每次取出不同的颜色

var colorList = ["#FFFF99","#B5FF91","#94DBFF","#FFBAFF","#FFBD9D","#C7A3ED","#CC9898","#8AC007","#CCC007","#FFAD5C"]; 
for(var i=0;i<lineList.length;i++){ 
var bgColor = getColorByRandom(colorList); 
} 
function getColorByRandom(colorList){ 
var colorIndex = Math.floor(Math.random()*colorList.length); 
var color = colorList[colorIndex]; 
colorList.splice(colorIndex,1); 
return color; 
}